Home / 81,078.39-121,617.58-41,091.15

Finding the Fourth Proportional to 81,078.39, 121,617.58 and 41,091.15

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Solution

The fourth proportional to 81,078.39, 121,617.58 and 41,091.15 is: 61,636.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,078.39 : 121,617.58 = 41,091.15 : x
  2. Step 2: Convert to fraction form
    81,078.39/121,617.58 = 41,091.15/x
  3. Step 3: Cross multiply
    81,078.39x = 121,617.58 × 41,091.15
  4. Step 4: Simplify right side
    81,078.39x = 4,997,405,836.20
  5. Step 5: Solve for x
    x = 4,997,405,836.20/81,078.39
  6. Step 6: Final answer
    x = 61,636.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.